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https://doi.org/10.1016/j.micromeso.2010.11.011
Title: | Gold nanoparticles supported on functionalized mesoporous silica for selective oxidation of cyclohexane | Authors: | Wu, P. Bai, P. Lei, Z. Loh, K.P. Zhao, X.S. |
Keywords: | Cyclohexane oxidation Functionalization Gold nanoparticle Mesoporous silica |
Issue Date: | May-2011 | Citation: | Wu, P., Bai, P., Lei, Z., Loh, K.P., Zhao, X.S. (2011-05). Gold nanoparticles supported on functionalized mesoporous silica for selective oxidation of cyclohexane. Microporous and Mesoporous Materials 141 (1-3) : 222-230. ScholarBank@NUS Repository. https://doi.org/10.1016/j.micromeso.2010.11.011 | Abstract: | Gold (Au) nanoparticles of sizes in the range of 2-4 nm dispersed on ordered mesoporous silica were prepared via a one-pot synthesis route in the presence of organosilane mercapto-propyl-trimethoxysilane (MPTMS). MPTMS was found to play a dual role: one was to coordinate the Au precursor (AuCl4-) via its thiol ligands and the other one was to form covalent bonds with the silica matrix. The interaction of the Au species with MPTMS was studied using real-time ultraviolet-visible spectroscopy and X-ray photoelectron spectroscopy techniques. The formation of Au (I)-thiolate complexes in the synthesis gel was identified and found to play a crucial role in the dispersion of the final Au nanoparticles on the support. The Au nanoparticles dispersed on the mesoporous silica exhibited high catalytic activity and selectivity in solvent-free selective oxidation of cyclohexane using molecular oxygen. © 2010 Elsevier Inc. All rights reserved. | Source Title: | Microporous and Mesoporous Materials | URI: | http://scholarbank.nus.edu.sg/handle/10635/63985 | ISSN: | 13871811 | DOI: | 10.1016/j.micromeso.2010.11.011 |
Appears in Collections: | Staff Publications |
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